I agree that the comparison to a top 'stat is important here. Senn decided to make their flagship a dynamic. One wonders if they'll make another 'stat. IIRC, at least some of the literature included reference to the Orpheus. A question I have is whether the Senn Masters, in a tacit acknowledgment that their stat line is dead, think they have managed to combine the best of both worlds. The transient response comments would seem to indicate that they are at least on to something. I am interested in the long-term impressions of the bass and the soundstage. If this soundstage is vastly expanded, but still blobby, then I'm not sure I would consider that a dramatic improvement.
In short, it will be fascinating to see if what we have is just an agile Senn up top that had to make sacrifices down low, or if they really managed to nail it and made a nimble dynamic that can deliver the highs and mids in addition to some fine thump at the bottom.
I am very much rooting for Sennheiser here. I trust these initial impressions, but they are not yet placed in the context of stats. I have to admit that if these sound as good or better than the O2, then I will be a bit torn.
Regardless, the introduction of these phones is a good thing for the hobby. Senn has thrown down the gauntlet, which means that other manufacturers may follow suit (although maybe they just don't want to play there in these times). It is great to see the continued innovation and dedication shown here. Instead of some ridiculous nod to low-fi with a design that is designed to have "bass that will fracture yer skullz!"
The price point is a bit of a concern. I don't think it is outrageous. In fact it seems to be pretty much on the money for a flahship, but I would hope that it is not an invitation to competitors to take a price increase. In other words, I hope it establishes a ceiling, not a floor.